Question

A polyestrous animal is
a. Man
b. Cat
c. Rabbit
d. Horse

Answer 1

Hint: Estrous cycle is the set of recurring changes that occur by producing the reproductive hormones seen in most of the mammalian therian female animals, estrous cycle generally starts after the sexual maturity of the female and they present until the death of the animal except at pregnancies.

Complete answer:
The mammalian reproductive system also has so many hormones it is mainly controlled by hypothalamic activity, where there is a release of gonadotropin-releasing hormones, and the pituitary gland releases the follicle-stimulating hormone and luteinizing hormone and ovaries release the progesterone and estrogen.

But there is some difference between the menstrual cycle and the estrous cycle.
- In the estrous cycle, the endometrium is reabsorbed, and the animals are sexually active only during the estrous cycles, and they are called in heat at that time.
- In the case of menstruation, a shed of the endometrium occurs, but here the animals are active at any period.

Generally, there are four stages in the estrous cycle, they are Proestrus, estrous, metestrus, diestrus. Based on the occurrence the estrous cycle is divided into three types they are
> Monoestrous: In these animals, there is a single estrous event that happens throughout that period.
Examples include dogs, foxes, wolves, bears, etc.

> Seasonally Polyestrous: estrus events occur in the clusters during a specific period of time.
Examples include sheep, goat, deer, cats, horses.

> Polyestrous: In this, there is a succession of estrous periods throughout a single sexual period.
Examples are cattle, pigs, mice, rats, rabbits.

Hence, the correct answer is option (C).

Note: One should not confuse estrous with estrus because estrous - It is a type of reproductive cycle seen in some mammalian animals, while estrus - this is one of the “Phase” in that reproductive cycle.